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Magnesium alloy as the lightest commercial structural metallic materials , light weight , high specific strength , high stiffness , damping suction noise ability , good electromagnetic shielding and casting performance of a series of unique advantages in the automotive , motorcycle cars increasingly wide range of applications , information and communication , aerospace and hand tools . However , the magnesium alloy is easily oxidized in the smelting process of combustion, the need to pass into the protective gas . SF6 mixed gas protection is the most commonly used at home and abroad , to protect the best method . But SF6 must CO2, N2 or dry air as a carrier gas was diluted to a certain concentration to use . N2 carrier gas is the most commonly used and inexpensive , traditional magnesium alloy gas protection technology other than the purchase of bottled gas main , there is the transport , storage , production scheduling , and many other issues . Therefore, in order to achieve lower production costs , improve production efficiency purposes, the development of convenient online nitrogen plant is imperative . Face higher cryogenic method and pressure swing adsorption nitrogen legal system nitrogen acquisition and cost issues , the focus for the current membrane separation nitrogen method does not fully consider the issue of the special nature of the production of magnesium alloy , suitable for the development of magnesium alloy die production of nitrogen technology . Part of the development tasks as commissioned by the Master Dragon Technology Co. , Ltd. , Chongqing magnesium alloy gas protection device , the author is responsible for the Tablet PC has mastered the magnesium alloy retardant and membrane separation technology based on the master unit and the man-machine interface , power control configuration software development platform magnesium alloy smelting with membrane nitrogen systems design and development . Monitor screen image to be displayed out of the system parameters and work status , and greatly simplifies the complexity of the operation , to reduce the failure rate of the device to improve nitrogen production efficiency as well as the accuracy of the system , flexibility . The complete system hardware resources configuration, software design and human-computer interface development , focusing on the influence of temperature, flow , pressure , and other parameters of the nitrogen purity . Eventually obtained through a large number of experiments , the optimal parameter settings .
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